# Compton amplitude and the nucleon structure functions on the lattice via the Feynman-Hellmann theorem

Particle Physics Theory seminar

#### Compton amplitude and the nucleon structure functions on the lattice via the Feynman-Hellmann theorem

• Event time: 2:00pm
• Event date: 28th April 2021
• Location: Online

### Event details

In this talk, I will be highlighting QCDSF/UKQCD Collaboration's recent developments on computing the Compton amplitude in a lattice approach. I briefly discuss how to access the Compton amplitude directly via the second-order Feynman-Hellmann theorem and as an application, present a calculation of the nucleon Compton tensor across a range of photon momenta. This enables us to study the $Q^2$ dependence of the low moments of the nucleon structure functions in a lattice calculation for the first time. I will also discuss possible further applications of this approach and present some preliminary results.

https://ed-ac-uk.zoom.us/j/84412830952

Meeting ID: 844 1283 0952

Passcode: bX86vwaA